Analysis of Pre-spraying Foliage Fertilizer on Fanqiu Late Rice Enhance the Ability of Resisting Cold Dew Wind

doi:10.3969/j.issn.1000-6362.2018.05.005

Abstract

Abstract: In recent years, Fanqiu-late rice(early rice varieties for late rice direct seeding cultivation) planting is developing rapidly with the advantages of low-cost and high-economic benefits, relieve of the season contradictions during double-cropping rice production. However, the grain yield of Fanqiu late rice was lower than that of late rice for that it was affected by cold dew wind at heading stage. Therefore, to provide technical support and theoretical basis for improving the disaster avoidance and reduction ability of Fanqiu-late rice responded on cold dew wind. Three treatments including clear water (CK) and foliage fertilizer Penshibao(T1) were pre-sprayed at 2 days before cold dew wind, and Penshibao(T2) at the cold dew wind coming day in initial heading stage were used to studied the mechanism of disaster avoidance and reduction about Fanqiu-late rice resisting cold dew wind in the present paper. The results showed that, compared with CK and T2, pre-spraying foliage fertilizer(T1) could promote Fanqiu-late rice for full heading safely, the growth period reduced three to four days; T1 was good for increasing the net photosynthetic rate at grain filling stage, facilitated the value of SPAD to decline, and thus promoting net photosynthetic rate to attenuate normally, so that the carbon nutrition of the plant was more coordinated with nitrogen nutrition, dry matter run more smoothly. Therefore, the grain filling rate of T1 were increased significantly (P<0.05), seed-setting rate of T1 were increased 9.5 to 13.9 percent point, and the grain yield of T1 were increased 15.8% to 23.7%. And the appearance quality and processing quality of rice were improved by apply with pre-spraying foliage fertilizer practice. As a result, it was a better way to increase the capacity of disaster avoidance and reduction to resist the cold dew wind of Fanqiu-late rice by application of pre-spraying foliage fertilizer practice.

Key words: Foliage fertilizer, Fanqiu-late rice, Cold dew wind, Disaster avoidance and reduction, Yield, Rice quality

LI Chao，XIAO Xiao-ping，TANG Wen-guang，TANG Hai-ming，WANG Ke，CHENG Kai-kai，GUO Li-jun，YANG Guang-li. Analysis of Pre-spraying Foliage Fertilizer on Fanqiu Late Rice Enhance the Ability of Resisting Cold Dew Wind[J]. Chinese Journal of Agrometeorology, 2018, 39(05): 337-343.

References

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